linux-kernel - Re: [tip:x86/asm] x86/i386: Make sure stack-protector segment base is cache aligned

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Message-ID: <4AA13B14.20000@zytor.com>
Date:	Fri, 04 Sep 2009 09:06:44 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Arjan van de Ven <arjan@...radead.org>
CC:	Ingo Molnar <mingo@...e.hu>, Jeremy Fitzhardinge <jeremy@...p.org>,
	mingo@...hat.com, linux-kernel@...r.kernel.org,
	jeremy.fitzhardinge@...rix.com, stable@...nel.org,
	tglx@...utronix.de, linux-tip-commits@...r.kernel.org,
	Tejun Heo <tj@...nel.org>
Subject: Re: [tip:x86/asm] x86/i386: Make sure stack-protector segment base
 is cache aligned

On 09/04/2009 07:15 AM, Arjan van de Ven wrote:
> 
> the other issue is that afaik we want the kernel to use the other
> register than userspace does...
> 

Yes, although it's a pretty marginal win on 32 bits as far as I know.
On 64 bits, not so.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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